Raccoon.QE
Class ParseEngine

java.lang.Object
  Raccoon.QE.ParseEngine

public class ParseEngine

extends java.lang.Object

ParseEngine : In the check process, we ask the user to specify relname for all the attribute. However, it could be improve to add some code to 'guess' the relnames. In the queryTree building-up, we build a left-deep tree, which may not be efficient, because cross operation could happen. select push down could be implemented

Constructor Summary

ParseEngine()

ParseEngine(QueryEngine newQE)

Method Summary

int	CheckCondAttr(CONDITION cond)
int	CheckSelParam(java.util.Vector selAttrs, java.util.Vector relations, java.util.Vector conditions)
QueryAnswer	getResult()
boolean	IsLOCAL_SEL(CONDITION cond)
boolean	IsLocalSFW(java.util.Vector selAttrs, java.util.Vector relations, java.util.Vector conditions) Check whether the SFW in only about local date
boolean	IsNeighborJoin(CONDITION cond)
void	printf(java.lang.String s)
int	select(NODE n, java.util.Vector selAttrs, java.util.Vector relations, java.util.Vector conditions) do the select
void	setDefaultNodeName(java.lang.String s)
void	Substite(QueryNode[] nodeArray, int nNodes, QueryNode oldNode, QueryNode newNode)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ParseEngine

public ParseEngine()

ParseEngine

public ParseEngine(QueryEngine newQE)

Method Detail

setDefaultNodeName

public void setDefaultNodeName(java.lang.String s)

select

public int select(NODE n,
                  java.util.Vector selAttrs,
                  java.util.Vector relations,
                  java.util.Vector conditions)
           throws java.sql.SQLException,
                  PVException

do the select

Throws:

java.sql.SQLException

PVException

CheckSelParam

public int CheckSelParam(java.util.Vector selAttrs,
                         java.util.Vector relations,
                         java.util.Vector conditions)
                  throws PVException

Throws:

PVException

CheckCondAttr

public int CheckCondAttr(CONDITION cond)
                  throws PVException

Throws:

PVException

IsLOCAL_SEL

public boolean IsLOCAL_SEL(CONDITION cond)

IsNeighborJoin

public boolean IsNeighborJoin(CONDITION cond)

Substite

public void Substite(QueryNode[] nodeArray,
                     int nNodes,
                     QueryNode oldNode,
                     QueryNode newNode)

printf

public void printf(java.lang.String s)

IsLocalSFW

public boolean IsLocalSFW(java.util.Vector selAttrs,
                          java.util.Vector relations,
                          java.util.Vector conditions)

Check whether the SFW in only about local date

getResult

public QueryAnswer getResult()